Morris lancaster



(No Model.)

M. LANCASTER. S OP MAKING BUILT UP WURKPOR PEW BACKS, 65o..

PROCES ,479. Patented Nov. 22, 1892.

335130 @Hom/1212* UNiTnn STATES PATnNgr Genion.

MORRIS LANCASTER, OF NORTHVILLE, MICHIGAN, ASSIGNOR OF ONE-HALF I `TO THE GLOBE FURNITURE COMPANY, OF SAME PLACE. v

PROCESS OF MAKING BUlLT-UP WORK .FOR PEN-BACKS, da.'

srncxsrcnrron' forming part of nettare Patent No. 486,479, atea November 2s, 1892. Application lo December 28, 1891. Serial No. 416.282. (No model.)

To all whom, it may concern.-

le it known that I, MORRIS LANCASTER, a citizen of the United States, residing at North-. ville, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in the Process ofd Making Built-Up vVork for Pew-Backs, Chairs, dsc.; and I declare the following to bea full,I clear, and ex-- act description of` .the same, such as will enable others skilled inthe art to which it appertains to make and use the same, reference belng had to the accompanying drawings, which form a part of thisspeoication.

lilly-invention relates to certain-'new and useful improvements in the methodl of constructing built-npwork for seating, -and more particularly inthe process of makingbuilt-up Work: for pews, chairs, and other articles.- of furniture; and it consists of the method hereinafter described and elaimed,',and illustrated in the accompanying drawings, in which` Flgure 1 is a v-iew in perspective showing a board A and indicating the kerf where it is sawed in two. Fig. 2 is a view in perspective showing a completed piece of seating, Aparts being broken away. Fig. 3 shows the built-up work in the press. Fig. 4 shows in `perspective and section the seating worked up into a pew back and seat.

My invention is designed more specifically as asupplementary'improvement in the construction of seat-backs'embodied in the patent to Faulhaber, granted November 24, 18,85, No. 331,122.

Icarry out my invention as follows: -A plain ilat board A is prepared of such dimensions 1n length, breadth, and thickness and of a kind and quality of lumber as is desired in the size and shape of the work required. This board A, while in its normal fiat and stlaight condition in which it is left after being so prepared, is lsmoothed through the ordinary smoothing or sanding machines, one

or both sides being` thereby dressed or' smoothed, or the surfaces thereof may be iinished by any other means desired. The

board after being so dressed and prepared is then passed througha resawing-inachine and sawed or split in two edgewise, as along the kerf a, (indicated partly in full and partly 5o 'sionsas the criginal'beard A, except as to thickness, the two boards A' A2 beingl dressed on their outer surfaces.V Between these two boards A A2, I then place. a thin sheet, core, 0r layer of wood B, of the same dimensions in length and width as the boards A A2. 'For the sheet lil, I prefer to luse rotary eut layers of about the same thickness as the saw-kert made in resawing the board A, as above described; but I do notlimit myselt thereto. The sheet B need not consist of a single integral piece, but may be composed of any number of pieces desired, laid edge to edge and substantially covering the adjacent inner surfaces of the boards A A2.

The inner surfaces of the boards A A2 made by thekerf in rcsawing the board A need@ not be dressed or smoothed. When the layer' B is to be secured in place, said inner surfaces are coated with glue, the'sheet B applied therebetween, and the whole is then put into an y suitable or desired presses C and conipactly pressed together in the presses, forms, or molds to the shape required until dry. When removed from the presses, forms, or molds, the material will retain the shape into which it has been so pressed.A Theouter surfaces or sides of the work being already dressed and finished, it is only necessary, furthermore, to trim the edges to any required shape.

It will be observed that the termin whichl the boards A" A2 and intervening sheet B are thuspresscd together determines the shape of the work. In this manner seating may be formed straight or curved in any direction or on any radius desired. The advantages of this method of making built-u p work are that it is accomplished with greater economy of material, as finished three-ply work is thus obtained of the standard thickness of the lumber used by the addition cf only a thin layer of wood. Seating can also he so made with great economy of labor and time, as the Workis largely made and finished while the board A is in tlatand straight condition before it isripped in'two, when it can be dressed and prepared by the smoothing-machinery in common use, thus avoiding the ditiicnlty of smoothing the work after being pressed into desired shape, no i'edressing being` required attei' the work is pressed into curved or irregular forms. It will be furthermore evident that the completed work will be of even and regular thicknesses throughout, no iiiatterhow crooked or devious the line of the saw-kerf may be, since at any point the exact thickness of the board A will be still retaiued in the completed back, the interposed lai'yer B being of even thickness.

In the formation of a seat-back, for exa`inple, when the built-up work has been thus prepared the edges need only further to be trimmed and a cap or molding D applied thereto to complete the back.

In manufacturing the device einbodiedin said Faulhaber patent it has been the com-- mon practice to take two boards for the exterior layers and dress their two-surfaces to forni a board of requisite thickness-say onefoiirth of an inch. Both boards for the exterior layers are so dressed on both sides separately. A third board, designed for the interior layer, is then dressed on both sides to a similar thickness--say one-fourth of an inch. I e have thus three one-fourth-inch boards,

each planed and dressed on both surfaces-to uniform thickness. These are then glued together and shaped as desired. It is commonfor the two outside boards to saw an inch board in two longitudinally, then plane each half down onboth surfaces to form a board of the uniform thickness of one-fourth of an inch. Another inch board is similarly sawed in two, and one half of it taken for t-he intei-ior layer, to be glued between thetwo parts, dressed down to one-fourth of an inch, as above described. Since the exterior boards are so dressed, the interior bo'ard must be also dressed in like manner. Th us we have, in the process heretofore common, three one-fourthinch boards, each dressed on all sides to a uniform thickness, the three when glued together forming a seat-back three-fourths of an inch in thickness.

The process which I herein describe, it will be seen, diers quite materially. A board A is dressed on its two surfaces-say to a thickness of three-fourths of an inch. A saw is then run through it to form two boards A and A2, the inner surfaces of which are left undressed as they come from thesaw'. 'A thin layer, preferably a thin rotary-cut veneer, as above described-say one-sixteenth of an inch in thickness-is interposed as an interiorlayer lof a thickness ordinarily simply corresponding to tlie thickness of the saw-kerf in ripping the board A in two. It will be seen that in sawing the board A in two certain unevennesses of thickness willarisein the two boards A' A2, due to the wabbling of the saw or unevenness of feedingtheboard to the saw; but

inasmuch as the same twoboards A A', 'Y

formed by resawing the board A, are put t0- gether for the exterior layers with a' thin yielding veneer between them, any unevenness in the two boards A A2 is immaterial,

inasmuch as the two boards hold thesaine relation one to the other in the completed article,

and the thin veneer of the thickness of the kerf I yields to the unevenness, and so the completed back is still of uniform thickness. The grain of the rotary-cut veneer extends across the4 grain of the two boards A A2 and makes a strong three-ply back, whereas by the Faulhaber process the grain of the inner board,

formed as above stated, extends in the same direction as the grain of the two outside boards; VIn my process the very saine two boards formed by resawing the board A must be employed in constructing a given back.

By the Faulhaber process any three boards of desired thickness may be put; together with out regard to whether the' two outside-layers formed one board originally or not. The

Faulhaber process also, as heretofore carried out, necessitates the dressingpf the in'- terior layer on both sides, as wellas all the surfaces' of the exterior layers. I am enabled bymy process to'dispense thus. with the labor, time, and expenseof dressing four snrfaces-viz., the two inn'ersn'rtaces of vmy outside boards and both surfaces of my inner ve-l neer-a saving which is 'very considerable, at the same time securing a muchv stronger back than has heretofore'been secured in form' ing "tlie Faulhaber seatfback.' The real and most important saving effected by my process is due to the fact that the mechanic does not have to take the lumber A" A back to a planer and to a sandpapering-machine after the board A is resawedyand the inner layer does not have to be run through a planer at/ all, and this has had to be done prior to my invention.

What I claim as my invention is 1. The' process herein.. described of constructing built-up work for seating, vconsisting of preparing a board A of desired length, breadth, and thickness, smoothing the surfaces of said board in-its normal dat condition, then resawing said board to form counterpart exterior boards A A, then applying a thin layer or veneer between the undressed surfacesvof said counterpart exterior boards, and compressing said exterior boards and the in-y terinediate layer by desired forms or molds to form seating of uniform thickness, substantially as described. A

2. The process herein described of constructing built-iip work for seating, consist` ing of preparing a board of desired length,

IIO

breadth, and thickness, smoothing said board in its normal dat condition, then resawing said board toy formcounterpart exterior boards A A, then cementing between the lundressed'iiiner surfaces of the boards A Al a thin rotarycut veneer having its 'grain extended across that of the exterior boards, eompressig said exterior' boards and said Veneer together' by desired forms or molds while the cement is green to form seating of uniform thickness, and then trimming the edges of said seating, substantially' as described.

In testimony whereof sign this Specification in the presence of two Witnesses.`

MORRISl LANCASTER.

Witnesses: A

H. P'.fADAMs, CHAs. BOOTH. 

